Amsterdamman's Roller bearing cup for 8-22-7 skateboard type 8mm bearings

thingiverse

Another component piece used in larger projects. These cups fit the common skateboard etc 8mm bearings. Bearing size is 8mm inner hole, 22mm outer edge and 7mm in height. The bearings just press into the cup and are held fairly tightly. I measure the outer cup diameter at 31mm and 13.5mm in height but they are sized to fit tightly inside both ends of a spool for a large 1kg 3DPrima com filament roll. The spool is currently printing and will be uploaded next. After a successful print my first uses show It works with very low drag and so far is very effective, the filament spool can be found here: http://www.thingiverse.com/thing:468157